Knockdown oven



(No Model.) 2 Sheets-Sheet 1.

M. S. SAGER. KNOGKDOWJV OVEN.

No. 402,978. Patented May 7,1889..

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(No Model.) I 2 Sheets-Sheet 2.

M. S. SAGER. KNOGKDOWN OVEN.

No. 402,978. Patented May '7, 1889.

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Attorney 7 N. PETERS. PhcloL'rlhugnpMr, Wuhingion. n c

5 UNITED STATES PATENT EFIcE,

MARCUS S. SAGER, OF WVASHINGTON COURT-HOUSE, OHIO.

KNOCKDOWN CVEN.

SPECIFICATION forming part of Letters Patent No. 402,978, dated May *7, 1889.

Application filed November 13, 1884. Serial No. 147,856. (No model.)

To all whom it may concern:

Be it known that I, MARCUS S. SAGER, a citizen of the United States of America, residing at Washington Court-House, in the county of Fayette and State of Ohio, have invented certain new and useful Improvements in Knockdown Ovens; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

My invention relates to certain new and useful improvements in knockdown ovens;

and it consists in the novel construction and,

arrangement of the parts, which will be more fully hereinafter described, and pointed out in the claims.

The object of my invention is to provide an oven of this class which issimple and effective in its construction and operation, strong and durable, and comparatively inexpensive of manufacture.

In the accompanying drawings, which illustrate my invention, Figure 1 is a perspective view of an oven constructed in accordance with my improvement. Fig. 2 is a vertical sectional view, and Fig. 3 is a horizontal sectional view.

A refers to the bottom plate of the oven, the edges a thereof being upturned and provided at suitable intervals with perforations, through which bolts pass for securing'said bottom plate, A, to the front, back, and end walls. The bottom plate is provided centrally with an opening, A, adjacent to which are secured legs or supports b, which hold in position above the openinga conical deflector, a, above which is located a fiat plate, a.

The outer side plates, B B, of the oven are provided at their upper and lower edges with perforations, through which the bolts pass for securing the same to the upturned edges of the bottom plate, A, and to the downturned edge of the top plate, 0, and the vertical edges of the plates B B are bent, as shown at a, so as to lie either over or under the vertical edges of the front and back plates.

The edges of the plates A, B B, O, and D,

more edges of the nuts of said bolts lying against the edges of the plates, so as to prevent the nuts turning when the bolts are tightened or loosened. The outer side plates,

B B, have centrally-struck-up portions g g, and near their lower edges openings or perforations b b.

The handles for carrying the oven may be attached to the outer plates, B B.

The outer back or rear wall, D, of the oven is also provided with an outwardly-struck-up central portion, as well as the top plate, though, if desirable, this top plate may be left fiat.

The front plate, E, of the oven has a doorway or opening, 6, and to this front plate is hinged a door, E, which has a centrally-struckup portion which will give greater stiffness and rigidity to the same.

By the construction described I provide an oven with outer walls, which can be readily attached and detached from each other, and

the plates of the outer walls being struck up at their central portions provide a larger interior space and add materially to the stiffness of the same. p

The oven is provided at top, sides, and back with inner walls, which are simply held in place-by frictional contact or wedging of said plates against the inner sides of the outer walls or against themselves. The rear inner wall, D, is corrugated vertically, and the vertical edges thereof are shaped so as to abut against the vertical edges of the inner side walls and against the inner sides adjacent to the edges of the back wall, D. The edges of this inner back wall, D are bent at an angle, so that the inner top wall can rest upon the same. By providing the back wall, D, with vertical corrugations a larger interior radiating-surface is provided, and the vertical flues between the inner and outer back walls are increased in size. The inner top wall, 0, has its edges bent upwardly, while the central portion is depressed, and these inner top and back walls form practically dead-air spaces, which serve to keep the heat confined within the oven. The inner side walls, B B, are providednear their upper ends with vertical corrugations e, and also with similar corru.

gations near their lower edges, while centrally they have transverse corrugations, which form supports for the shelves F F. The inner side plates, B, are provided near their upper edges with openings or perforations b, which open into the flues G, which are formed between the outer walls, 13, and the inner walls, B.

The doorway in the front plate, E, is of sufficient size to admit the shelves or trays F, being slipped through the same in a horizontal position, so as to rest upon the transverse corrugations with which the inner side plates are provided, and as the inner, top, rear, and

side walls are only wedged in place they can be removed through the doorway when desired without taking the outer Walls apart.

WVhen the oven is placed upon a stove or other heating device, the heated air will enter the opening A and will be deflected, so as to avoid a direct current to the top of the oven, and after passing around the articles placed upon the trays will pass upward and carry the heated air and fumes through the openings in the upper edges of the inner walls, so that they will enter the side flues, G, and escape through the openings 1), so that the side flueswill not only serve to heat the oven, but will also provide a means for ventilating the same.

By providing the deflector with a top plate, a, articles placed immediately above said plate will not be unduly heated.

I claim 1. In an oven of the class described, having the outer walls thereof secured to each other at their abutting points by removable fastening devices, the detachable inner walls, held in position by frictional contact with the outer walls and with each other, the outer wall of the bottom having a central opening and a doorway formed inone of the outer walls, the parts being combined substantially as shown, and for the purpose set forth.

2. In combination with an oven of the class described, irrespective of specific construction, and provided with a bottom having a central opening, a hollow conical deflector having a flat top or covering plate, so as to form a dead-air space within the deflector, substantially as shown, and for the purpose set forth.

3. In an oven, an outer casing formed with separable or detachable walls, a doorway formed in one of the outer walls, heat induction and eduction orifices, the removable plates forming the inner walls having bent edges which engage with the inner portion of the outer casing, so as to support the inner Walls withinthe outer casing, the parts being combined substantially as shown.

4. In combination with the outer casing of a portable oven, the inner vertical side plates, B 13, provided centrally with transverse corrugations for the reception of trays and vertical corrugations for'stiifening the plates, said plates being adapted to be maintained in position by frictional contact with the outer casing, substantially as shown.

5. In a knockdown oven, the vertical walls having their edges bent to overlap the vertical edges of the walls adjacent thereto, top and bottom plates provided with downwardly and upwardly bent edges which overlap the longitudinal edgesof the front, back, and side walls, the edges of the overlapping plates having perforations which register,and bolts and nuts for securing the walls to each other, the perforations being so located that one or more sides of the nuts will engage with the bent portion of the plate to prevent rotation of the nuts when the bolts are turned, the parts being adapted to be combined substantially as shown, and for the purpose set forth.

6. The combination, in a knockdown oven, of the outer walls, the edges of which are bent to overlap each other and are provided with corresponding perforations, bolts and nuts for securing the edges of the outer walls to each other, the inner walls having their edges bent to be supported by contact with the outer walls at their edges and provide air-spaces between the inner and outer walls, substantially as shown.

In testimony whereof I aflix my signature in presence of two witnesses.

MARCUS S. SAGER.

lVitnesses:

MILES GARDNER, W. A. Monnrs. 

